CN104919622A - Battery module - Google Patents

Battery module Download PDF

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Publication number
CN104919622A
CN104919622A CN201480004911.XA CN201480004911A CN104919622A CN 104919622 A CN104919622 A CN 104919622A CN 201480004911 A CN201480004911 A CN 201480004911A CN 104919622 A CN104919622 A CN 104919622A
Authority
CN
China
Prior art keywords
battery
cap assembly
opposed
wall portion
battery module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201480004911.XA
Other languages
Chinese (zh)
Other versions
CN104919622B (en
Inventor
渡边慎太郎
大石英史
酒井崇
中条祐贵
植田浩生
守作直人
前田和树
加藤崇行
佐佐木智则
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyoda Automatic Loom Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoda Automatic Loom Works Ltd filed Critical Toyoda Automatic Loom Works Ltd
Publication of CN104919622A publication Critical patent/CN104919622A/en
Application granted granted Critical
Publication of CN104919622B publication Critical patent/CN104919622B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The invention provides a battery module, which comprises a plurality of secondary batteries and a battery cover, wherein: the secondary batteries are disposed adjacent to each other; each of the secondary batteries has a battery case having a wall portion equipped with an open valve that is constructed so as to open when the inner pressure of the battery case rises up to a threshold value; and the battery cover faces the wall portion. The battery cover has a plurality of cover members provided side by side in a direction toward which the secondary batteries are disposed adjacent to each other. The cover members include at least adjacent first and second cover members. The first cover member has a first edge portion and the second cover member has a second edge portion overlapped with the first edge portion.

Description

Battery module
Technical field
The present invention relates to the battery module be set up in parallel by the secondary cell with open valve.
Background technology
As the battery module possessing multiple secondary cell, such as, be known to the battery module described in patent documentation 1.Battery module described in patent documentation 1 contains multiple secondary cell in the inside of shell.Each secondary cell has can with the exhaust component of the opened by pressure of setting.
Patent documentation 1: Japanese Unexamined Patent Publication 2012-104471 publication
But, if the pressure of the inside of secondary cell arrives the pressure that is set and exhaust component is unlocked, then there is content (such as, if lithium rechargeable battery, then mainly the solvent of electrolyte, lithium salts decompose or the gas of gasification) etc. the situation of discharging from secondary cell as effluent.
Summary of the invention
The object of the invention is to, a kind of battery module dispersed that can suppress effluent is provided.
The battery module solving above-mentioned problem possesses: the multiple secondary cells be set up in parallel, and each secondary cell has battery container, and battery container has wall portion, and above-mentioned wall portion possesses and is configured in above-mentioned battery container, press the open valve opened when rising to threshold value; And battery cover, it is opposed with above-mentioned wall portion.Above-mentioned battery cover has and is set up in parallel along above-mentioned multiple secondary cell multiple cap assemblies that direction is arranged side by side.Above-mentioned multiple cap assembly at least comprises the first adjacent cap assembly and the second cap assembly.Above-mentioned first cap assembly has the first edge, and above-mentioned second cap assembly has the second edge overlapped with above-mentioned first edge.
Accompanying drawing explanation
Fig. 1 is the stereogram of the battery pack represented involved by execution mode.
Fig. 2 is the stereogram representing the battery module that the battery pack of Fig. 1 possesses.
Fig. 3 is the vertical view of the battery module of the Fig. 2 of the state representation eliminating battery cover.
Fig. 4 is the 4-4 line cutaway view of Fig. 3.
Fig. 5 is the stereogram of the relation representing rectangular cell, battery carrier and heat-conducting plate.
Fig. 6 is the cutaway view of a part for the battery module representing Fig. 2 in the way to enlarge.
Fig. 7 (a) and Fig. 7 (b) is the stereogram representing the first cap assembly.
Fig. 8 (a) and Fig. 8 (b) is the stereogram representing the second cap assembly.
Embodiment
Below, an execution mode of battery module is described.
As shown in Figure 1, battery pack 10 has multiple battery modules 20 of the inside being contained in framework 11.Battery pack 10 has two groups of row be made up of three battery modules 20 along vertical laminated configuration.
As shown in FIG. 2 and 3, in battery module 20, the rectangular cell 21 as secondary cell is arranged side by side along the thickness direction of rectangular cell 21 with the state being held in battery carrier 30.In addition, heat-conducting plate 40 (with reference to Fig. 6) is alternately set side by side with rectangular cell 21.Each rectangular cell 21 has positive terminal 22 and negative terminal 23.Rectangular cell 21 is set up in parallel in the mode that the positive terminal 22 of adjacent rectangular cell 21 is adjacent with negative terminal 23.The positive terminal 22 of adjacent rectangular cell 21 is connected by bus bar 12 with negative terminal 23, and multiple rectangular cell 21 is connected in series thus.
The two ends being set up in parallel direction of rectangular cell 21 are provided with end plate 13,14.Inserted bolt B at end plate 13, and this bolt B screws togather in the outside of end plate 14 and nut N.Rectangular cell 21 and heat-conducting plate 40 are clamped by end plate 13,14, and from rectangular cell 21 to be set up in parallel direction pressurized.End plate 13,14 is provided with the bracket 15 for battery module 20 being fixed on framework 11.
In battery module 20, the short transverse of rectangular cell 21 side (with the positive terminal 22 of rectangular cell 21 and negative terminal 23 side corresponding to the side of giving prominence to) be provided with battery cover 50.Battery cover 50 has and is set up in parallel one group of adjacent cap assembly of direction i.e. the first cap assembly 60 and the second cap assembly 70 along rectangular cell 21.Battery cover 50 is placed with the control appliance 51 (control circuit) that square shaped battery 21 carries out controlling, and this control appliance 51 controlled device cover 52 covers.Battery cover 50 is placed with in the mode adjacent with control appliance 51 electronic unit 53 of the discharge and recharge contributing to rectangular cell 21, and this electronic unit 53 is covered by electronic unit cover 54.
As shown in Figure 4, rectangular cell 21 has battery container 24 and the electrode assemblies 25 being contained in battery container 24.Battery container 24 is made up of the main part 26 of the rectangular box of accommodating electrode assemblies 25 and the cap 27 of rectangular plate-like of the peristome of closing main part 26.Cap 27 is provided with positive terminal 22 and negative terminal 23.Break when cap 27 is provided with and presses and rise to threshold value in battery container 24 and the open valve 28 be unlocked.When this " threshold value " is set to press in battery container 24 and increases, make because of pressure in it pressure that open valve 28 breaks at battery container 24 before breakage.The stacked multiple positive and negative electrode of electrode assemblies 25 forms.Positive terminal 22 and negative terminal 23 are electrically connected on electrode assemblies 25 via positive conductive parts 22a and negative conductive parts 23a respectively.
As shown in Figure 5, battery carrier 30 has the first covering part 31 of rectangular flat shape.The second covering part 32 of the rectangular flat shape that the thickness direction to the first covering part 31 extends is provided with at the long side direction two ends of the first covering part 31.At the long side direction first end 32a (end of the side contrary with the end being provided with the first covering part 31) of each second covering part 32, be provided with the 3rd covering part 33 of the rectangular flat shape extended between the short side direction first end 32b of the second covering part 32.The thickness direction of the 3rd covering part 33 is consistent with the short side direction of the second covering part 32, and the direction that the long side direction of the 3rd covering part 33 is opposite each other with the second covering part 32 is consistent.And the direction orthogonal with the thickness direction of the 3rd covering part 33 and long side direction becomes the short side direction of the 3rd covering part 33.
In addition, an end face of the short side direction of the 3rd covering part 33 at the long side direction two ends place of the 3rd covering part 33 is respectively arranged with terminal accommodating portion 34.Each terminal accommodating portion 34 in U-shaped, and to the thickness direction opening of the 3rd covering part 33.In addition, each terminal accommodating portion 34 is connected with in each second covering part 32.
In each terminal accommodating portion 34, to the cover support 34a of the tabular that battery cover 50 supports, project from the face of the face opposite side engaged with the 3rd covering part 33.This cover support 34a is provided with otch 34b.
On an end face of the short side direction of the 3rd covering part 33, be provided with the post parts 35 of quadrangular shape along the mode that the short side direction of the second covering part 32 extends with the axle of post parts 35, post parts 35 are adjacent with terminal accommodating portion 34.At post parts 35 to be provided with along its axial through mode the inserting hole 35a inserted for bolt B.
At the long side direction first end 32a of the second covering part 32, be provided with and be connected with the second covering part 32, and along the cover maintaining part 36 that the long side direction of the second covering part 32 extends.The rectangular tabular of cover maintaining part 36.The engagement pawl 37 that battery cover 50 is engaged is provided with in cover maintaining part 36.In addition, be provided with the foot 38 of quadrangular shape along the mode that the short side direction of the second covering part 32 extends with the axle of foot 38 at the long side direction the second end 32c of the second covering part 32.In foot 38 to be provided with along its axial through mode the inserting hole 38a inserted for bolt B.
The rectangular tabular of heat-conducting plate 40, and be made up of the main body 41 clamped by rectangular cell 21 and the radiating part 42 that extends along the thickness direction of main body 41 from long side direction one end of main body 41.
As shown in Fig. 7 (a) and Fig. 7 (b), the first main part 61 that the first cap assembly 60 has rectangular plate-like and the first extension 62 of rectangular plate-like extended from the short side direction two ends of the first main part 61 to the thickness direction of the first main part 61.The long side direction of the first main part 61 and the long side direction of the first extension 62 become equidirectional.The short side direction of the first main part 61 extends along the thickness direction of the first extension 62, and the short side direction of the first extension 62 extends along the thickness direction of the first main part 61.In the following description, using the one side being provided with the first extension 62 of the first main part 61 as the first inner surface 64, using the face with the first inner surface 64 opposite side as the first outer surface 63.First outer surface 63 is also referred to as first surface, and the first inner surface 64 is also referred to as second.
At the long side direction first end 61a of the first main part 61, be provided with the first thinner wall section 65 caved in from the first inner surface 64 towards the first outer surface 63.At the long side direction first end 62a (end corresponding with the long side direction first end 61a of the first main part 61) of the first extension 62, be provided with the thickness direction depression to the first extension 62 and the thinner wall section 66 be connected with the first thinner wall section 65.
At the long side direction the second end 61b of the first main part 61, be equipped with the rectangular-shaped bolted portion 67 of giving prominence to from the first outer surface 63 for a pair.The inserting hole 67a that the long side direction along the first main part 61 extends is provided with in bolted portion 67.Bolt B has been inserted at inserting hole 67a.In battery module 20, this bolted portion 67 is opposed with the post parts 35 of battery carrier 30, thus the inserting hole 67a in bolted portion 67 is communicated with the inserting hole 35a of battery carrier 30.At short side direction first end 61c and the short side direction the second end 61d of the first outer surface 63, be provided with from the outstanding jut 69 of the first outer surface 63 in mode spaced apart respectively.Jut 69 is set to, and the jut 69 of short side direction first end 61c and the jut 69 of short side direction the second end 61d be not to interlock in the mode that the short side direction of the first main part 61 is opposed.
Second cap assembly 70 is in shape identical with the first cap assembly 60 except the shape of thinner wall section.Below, be described particularly.
As shown in Fig. 8 (a) and Fig. 8 (b), the second main part 71 that the second cap assembly 70 has rectangular plate-like and the second extension 72 of rectangular plate-like extended from the short side direction two ends of the second main part 71 to the thickness direction of the second main part 71.The long side direction of the second main part 71 and the long side direction of the second extension 72 become equidirectional.The short side direction of the second main part 71 extends along the thickness direction of the second extension 72, and the short side direction of the second extension 72 extends along the thickness direction of the second main part 71.In the following description, using the face being provided with the second extension 72 of the second main part 71 as the second inner surface 74, using the face with the second inner surface 74 opposite side as the second outer surface 73.Second outer surface 73 is also referred to as the 3rd, and the second inner surface 74 is also referred to as fourth face.
The second thinner wall section 75 caved in towards the second inner surface 74 is provided with at the long side direction first end 71a of the second main part 71.At the long side direction first end 72a (end corresponding with the long side direction first end 71a of the second main part 71) of the second extension 72, be provided with the thickness direction depression to the second extension 72 and the thinner wall section 76 be connected with the second thinner wall section 75.
The rectangular-shaped bolted portion 77 of giving prominence to from the second outer surface 73 for a pair is equipped with at the long side direction the second end 71b of the second main part 71.The inserting hole 77a that the long side direction along the second main part 71 extends is provided with in bolted portion 77.Bolt B has been inserted at inserting hole 77a.Be provided with from the outstanding jut 79 of the second outer surface 73 in mode spaced apart respectively at the short side direction first end 71c of the second outer surface 73 and short side direction the second end 71d.Jut 79 is set to the jut 79 of short side direction first end 71c with the jut 79 of short side direction the second end 71d not interlock in the mode that the short side direction of the second main part 71 is opposed.
As shown in Figure 6, battery cover 50 is configured to, and overlaps in vertical in first thinner wall section 65 being arranged at long side direction first end 61a of the first cap assembly 60 with second thinner wall section 75 being arranged at long side direction first end 71a of the second cap assembly 70.Namely, first cap assembly 60 has first edge opposed with the second cap assembly 70 at long side direction first end 61a, second cap assembly 70 has second edge opposed with the first cap assembly 60 at long side direction first end 71a, and these first edges overlap in the mode opposed at the thickness direction of battery cover 50 with the second edge.
First outer surface 63 of the first cap assembly 60 is opposed with the wall portion being provided with open valve 28 of cap 27, i.e. battery container 24.In the same manner, the second outer surface 73 of the second cap assembly 70 is opposed with cap 27.Therefore, the opposed faces opposed with cap 27 of battery cover 50 becomes the first outer surface 63 (first surface) and the second outer surface 73 (the 3rd face).Battery cover 50 is positioned on battery carrier 30 (cover support 34a and post parts 35 on).The front end of the first extension 62 and the second extension 72 (the first extension 62 and the second extension 72 with the end of end opposite side being provided with the first main part 61 and the second main part 71) engages mutually with engagement pawl 37, thus is fixed with the first cap assembly 60 and the second cap assembly 70 at battery carrier 30.The jut 69,79 being arranged at the first cap assembly 60 and the second cap assembly 70 enters between bus bar 12, thus maintains the insulating properties between adjacent bus bar 12.
As shown in Figure 4, the region A between cap 27 and the first main part 61 and the second main part 71, opposed with open valve 28.Region A extends along the direction that is set up in parallel of rectangular cell 21.The two ends, direction that are set up in parallel of rectangular cell 21 are provided with end plate 13,14, but produce gap between end plate 13 and the first cap assembly 60 or between end plate 14 and the second cap assembly 70, and do not close closed region A.Region A plays function as the stream of the ventilation for the gas circulation of discharging from rectangular cell 21.
Next, the effect of the battery module 20 of present embodiment is described.
In battery module 20, there is the situation producing error because of the foozle of battery carrier 30, heat-conducting plate 40 and rectangular cell 21 in the size being set up in parallel direction of rectangular cell 21.In addition, as the battery module 20 of present embodiment, when being pressurizeed by end plate 13,14 square shaped battery 21 and heat-conducting plate 40, square shaped battery 21 and heat-conducting plate 40 apply certain load.Now, the size being set up in parallel direction sometimes also because of the applying mode of load at the rectangular cell 21 of battery module 20 produces error.
In battery module 20, when the size being set up in parallel direction of rectangular cell 21 increases because of error, if battery cover 50 is made up of single parts, then there is the situation that cannot configure battery cover 50 above the open valve 28 of the rectangular cell 21 of a part.In this condition, if discharge the gas (effluent) of high temperature from the open valve 28 of rectangular cell 21, then cause the gas of high temperature and other the battery module 20 be configured at above vertical to touching.
In the battery module 20 of present embodiment, when create battery module 20 rectangular cell 21 be set up in parallel the scale error in direction, make the first cap assembly 60 to sliding from long side direction first end 61a towards the direction of long side direction the second end 61b or making the second cap assembly 70 slide to from long side direction first end 71a towards the direction of long side direction the second end 71b, thus reduce the amount of coincidence of the first thinner wall section 65 and the second thinner wall section 75.Thus, the total length of battery cover 50 can be adjusted by the amount of coincidence of the first cap assembly 60 with the second cap assembly 70.
If discharge the gas of high temperature from rectangular cell 21, then can suppress dispersing of this gas by battery cover 50, therefore the gas of high temperature is difficult to the battery module 20 be configured at above vertical directly to touching.The total length of battery cover 50 can be adjusted by the amount of coincidence of the first cap assembly 60 with the second cap assembly 70, therefore, it is possible to suppress to configure above the open valve 28 of the rectangular cell 21 of a part the situation of battery cover 50, therefore, it is possible to suitably suppress the gas of discharging from the open valve 28 of each rectangular cell 21 and battery module 20 to touching.In addition, by closing the side in the gap between end plate 13 and the first cap assembly 60 and the gap between end plate 14 and the second cap assembly 70, thus the direction of Exhaust Gas can be limited.Such as, in the present embodiment, end plate 14 is adjacent with other battery module 20, therefore also can close the gap between end plate 14 and the second cap assembly 70, and not make gas discharge to adjacent battery module 20 direction.
In addition, even if when discharging the conductive materials such as electrolyte from the open valve 28 of rectangular cell 21, also dispersing of effluent can be suppressed by battery cover 50.
Therefore, according to above-mentioned execution mode, following effect can be obtained.
(1) battery cover 50 is made up of the first cap assembly 60 and the second cap assembly 70.First cap assembly 60 is provided with the first thinner wall section 65, the second cap assembly 70 is provided with the second thinner wall section 75.Second thinner wall section 75 of the second cap assembly 70 overlaps with the first thinner wall section 65 of the first cap assembly 60.And, in battery module 20, when creating error in the size being set up in parallel direction of rectangular cell 21, when manufacturing battery module 20, first cap assembly 60 or the second cap assembly 70 are slided, the overlap amount of the first thinner wall section 65 with the second thinner wall section 75 is adjusted, thus can adjust the total length of battery cover 50.Therefore, be difficult to produce gap in battery cover 50, thus the effluent when discharging effluent from the open valve 28 of rectangular cell 21 can be suppressed to spill from the gap of battery cover 50.Therefore, it is possible to suppress dispersing of the effluent of discharging from rectangular cell 21.Its result, can suppress the gas of the high temperature of discharging from the open valve 28 of rectangular cell 21 and the battery module 20 be configured at above vertical directly to touching, thus battery module 20 can be suppressed to be heated.Therefore, be difficult to produce temperature difference or rectangular cell 21 is heated excessively and causes the service life reduction of battery module 20 at each rectangular cell 21 of battery module 20.
(2) the first cap assembly 60 is provided with the first thinner wall section 65, the second cap assembly 70 is provided with the second thinner wall section 75.Therefore, the first thinner wall section 65 is overlapped with the second thinner wall section 75, thus the fluctuating of battery cover 50 can be reduced, and then the assembleability of battery cover 50 can be improved.
(3) battery cover 50 is fixed on battery carrier 30.Therefore, even if when battery module 20 is applied in vibration, battery cover 50 is also difficult to dislocation, thus can improve vibration resistance.Therefore, after manufacture battery module 20, the first cap assembly 60 can be suppressed to stagger because vibrating grade with the amount of coincidence of the second cap assembly 70.In addition, battery cover 50 can be suppressed to come off from battery module 20.
The jut 69,79 of (4) first cap assemblies 60 and the second cap assembly 70 is arranged between adjacent bus bar 12.Therefore, it is possible to maintain the insulating properties between adjacent bus bar 12, thus rectangular cell 21 is made to be difficult to short circuit.
(5) region in battery cover 50 can be utilized as the space arranged for control appliance 51.
In addition, execution mode also can change as follows.
Battery cover 50 also can be made up of the cover of more than three.
Also can not thinner wall section be set, but make the size of the short side direction of the first main part 61 of the first cap assembly 60 (or second cap assembly 70) shorter than the size (inside dimension) in the opposed direction of the second extension 72 of the second cap assembly 70 (or first cap assembly 60), and the first cap assembly 60 is overlapped with the second cap assembly 70.First cap assembly 60 enters between the second opposed extension 72 of the second cap assembly 70, thus the first cap assembly 60 overlaps with the second cap assembly 70.In addition, also can in the edge opposed with the second cap assembly 70 of the first cap assembly 60, the short side direction entirety arranged along the first main part 61 extends and the protuberance outstanding to the long side direction of the first main part 61, and in the edge opposed with the first cap assembly 60 of the second cap assembly 70, the recess inserted for protuberance is set.And, also can adjust the insertion of the protuberance of the first cap assembly 60, thus the overlap amount of the first cap assembly 60 with the second cap assembly 70 is adjusted.
Battery cover 50 also can be fixed on the parts beyond battery carrier 30.Such as, end plate 13,14 can be also fixed on.
Jut 69,79 can be set at the first cap assembly 60 and the second cap assembly 70 yet.In this case, preferably utilize the method except jut 69,79, guarantee the insulating properties between adjacent bus bar 12.
Control appliance 51, electronic unit 53 also can be arranged at except in battery cover 50 (such as, the inside of framework 11, outside).
As secondary cell, the battery of cascade type, cylindrical battery also can be used.
First cap assembly 60 also can be only made up of the first main part 61.In addition, the second cap assembly 70 also can be only made up of the second main part 71.In this case, preferably the first main part 61 and the second main part 71 are fixed on battery module 20.
Also seal member can be set between the first thinner wall section 65 and the second thinner wall section 75.
In embodiments, though laminated configuration three battery modules 20, the number of battery module 20 also can suitably change.In addition, battery module 20 also can be odd number.

Claims (5)

1. a battery module, is characterized in that, possesses:
The multiple secondary cells be set up in parallel, each secondary cell has battery container, and battery container has wall portion, and described wall portion possesses and is configured in described battery container, press the open valve opened when rising to threshold value; And
Battery cover, it is opposed with described wall portion,
Described battery cover has and is set up in parallel along described multiple secondary cell multiple cap assemblies that direction is arranged side by side,
Described multiple cap assembly at least comprises the first adjacent cap assembly and the second cap assembly,
Described first cap assembly has the first edge,
Described second cap assembly has the second edge overlapped with described first edge.
2. battery module according to claim 1, is characterized in that,
Described first cap assembly has the first surface opposed with the described wall portion of described battery container and with this first surface opposite side second, and described first edge has the first thinner wall section caved in facing to described first surface from described second,
Described second cap assembly has opposed with the described wall portion of described battery container the 3rd and fourth face with the 3rd opposite side, and described second edge has the second thinner wall section caved in facing to described fourth face from the described 3rd,
Described first thinner wall section overlaps with described second thinner wall section.
3. battery module according to claim 1 and 2, is characterized in that,
Also possess the multiple battery carriers keeping described secondary cell respectively,
Described battery cover is fixed on described battery carrier.
4. the battery module according to any one of claims 1 to 3, is characterized in that,
Adjacent described secondary cell is connected by bus bar,
Described battery cover has the opposed faces opposed with the described wall portion of described battery container,
Described battery cover is provided with the outstanding jut of described wall portion from described opposed faces towards described battery container,
Described jut is arranged between adjacent bus bar.
5. the battery module according to any one of Claims 1 to 4, is characterized in that,
Described battery cover has the opposed faces opposed with the described wall portion of described battery container,
With on the face of described opposed faces opposite side, be provided with the control appliance that described secondary cell is controlled.
CN201480004911.XA 2013-01-31 2014-01-31 Battery module Active CN104919622B (en)

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JP2013016793A JP5590165B2 (en) 2013-01-31 2013-01-31 Battery module
PCT/JP2014/052243 WO2014119722A1 (en) 2013-01-31 2014-01-31 Battery module

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JP5590165B2 (en) 2014-09-17
EP2953182A1 (en) 2015-12-09
US9806308B2 (en) 2017-10-31
US20150349306A1 (en) 2015-12-03
CN104919622B (en) 2017-05-31
EP2953182A4 (en) 2016-07-13
EP2953182B1 (en) 2017-08-23
JP2014149940A (en) 2014-08-21

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